CMS Close Ratio Racing Gearbox - Yamaha Z125/125z

Close ratio gearboxes are one of the many items in the CMS racing product arsenal. These preset gearbox ratios have been tried and tested on track so you don't need to figure out for yourself. This race proven gearbox should give you a shorter and closely spaced ratio than the standard unit, with a higher first and lower overall top gear. Suitable for circuit racing or going crazy on the streets. Gearbox Ratio (Counter shaft / Front Sprocket Shaft): 1st gear (15T / 30T) 2nd gear (17T / 28T) 3rd gear (20T / 26T) 4th gear (24T / 22T) 5th gear (23T / 23T) 6th gear (22T / 24T)

Part no. MG-180